Waterproof adhesive



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Patented Oct. 28, 1930 UNITED STATES Gross eierenca PATENT oFFicE JAMES B. MULLADY, OF DUBUQUE, IOWA warmarnoor ADHESIVE No Drawing.

Silicate of soda (40 Baum) 6 to oz.

Casein; 1 lb.

Hydrated lime 3 oz. 1 Borax 2to 4 oz.

Water 3lbs.

The casein, lime and borax are thoroughly mixed and the dry mixture placed in a box or other suitable package and in this state sup;

plied to the user togethegwith diregtions for mixing. The silicate of soda may be supplied by the manufacturer in a package separate from the mixed casein, lime and borax, or may be purchased separately.

When the glue is to be used, it is mixed as follows:

The water and silicate of soda are placed in a mixi' which i s starte d'i' The mixedgge; in, lime andlgorax are now gradually added to tlie fiixer containing the soda. and water. The mixer is continued in operation during the addition of the mixture of casein, lime and borax and until the adhesive begins to thicken. At this stage the mixer is stopped for a period of about twenty minutes, after which it is again started and permitted to run for about ten minutes when the glue is ready for use. If the glue is too thick more water may be added. Since the glue will remain soft enough for use only from four to ten hours and can not be resoftened if it hardens, only enough for immediate use should be mixed at one time. If a small quantity of the glue is needed a less proportionate amount of water and soda and casein, lime and borax are used and the balance put away in a cool dry place until again needed. The advantages gained by using the ingredients specified are as follows:

Silicate of soda extends the life of the glue. Lime makes the glue waterproof and borax increases the strength and extends the life thereof.

Having thus described the invention, I claim:

The process of compounding a water-proof adhesive consisting of mixing from six to ten ounces of silicate of soda in approximately three barrels of water and while mixing the same gradually adding thereto a mixture consisting of approximately one pound of casein, three and one-quarter ounces of hydrated Application filed July 28, 1927. Serial No. 209,180.

lime, and two to four ounces of borax, previously intermingled, stirring the same until the resulting mixture begins to thicken, allowing the mixture to stand for approximately twenty minutes, and again stirring for approximately ten minutes.

In testimony whereof I aflix my signature.

JAMES B. MULLADY. [1,. 8.]

Examiner 

